I successfully built and ran the application.
But comparing it to the pre-built ZIP installation for Linux 64bit I find it is different!
Surely it was meant to produce the same release?

The splash screen was never updated from 2.63 to 2.63a, so that is no indicator I know.
The ZIP build gives an r48... number.
The build from source says "rexporte" instead.

On the ZIP build I have full Cycles/CUDA support.
The source build has no option for CUDA. I can only use my GPU by selecting OpenCL and also "Experimental" features. So all in all it seems to be a slightly older version.